Pregled bibliografske jedinice broj: 169586
Changes in the Hurst exponent of heartbeat intervals during physical activity
Changes in the Hurst exponent of heartbeat intervals during physical activity // Physical review. E, Statistical, nonlinear, and soft matter physics, 70 (2004), 1; 012903, 4 doi:10.1103/PhysRevE.70.012903 (međunarodna recenzija, članak, znanstveni)
CROSBI ID: 169586 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Changes in the Hurst exponent of heartbeat intervals during physical activity
Autori
Martinis, Mladen ; Knežević, Andrea ; Krstačić, Goran ; Vargović, Emil
Izvornik
Physical review. E, Statistical, nonlinear, and soft matter physics (1539-3755) 70
(2004), 1;
012903, 4
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
heartbeat fluctuations ; Hurst exponent
Sažetak
The fractal scaling properties of the heartbeat time series are studied in different controlled ergometric regimes using both the improved Hurst rescaled range (R/S) analysis and the detrended fluctuation analysis (DFA). The long-time "memory effect" quantified by the value of the Hurst exponent H>0.5 is found to increase during progressive physical activity in healthy subjects, in contrast to those having stable angina pectoris, where it decreases. The results are also supported by the detrended fluctuation analysis. We argue that this finding may be used as a useful new diagnostic parameter for short heartbeat time series.
Izvorni jezik
Engleski
Znanstvena područja
Fizika
POVEZANOST RADA
Projekti:
0098004
Ustanove:
Institut "Ruđer Bošković", Zagreb
Profili:
Andrea Knežević
(autor)
Emil Vargović
(autor)
Mladen Martinis
(autor)
Goran Krstačić
(autor)
Citiraj ovu publikaciju:
Časopis indeksira:
- Current Contents Connect (CCC)
- Web of Science Core Collection (WoSCC)
- Science Citation Index Expanded (SCI-EXP)
- SCI-EXP, SSCI i/ili A&HCI
- Scopus
- MEDLINE
